Electric spindle motor
AssigneeData Storage Institute
InventorsZhejie Liu, M.A. Jabbar, Qide Zhang, Teck Seng Low, Shixin Chen, Yuen Ann Mah
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Abstract
An electric spindle motor has a base assembly (19) and a hollow notatable hub (16) housing a motor. The hub (16) is mounted for rotation about an axis and a stator (12) is mounted on the base assembly (19) inside the hub (16). A liquid filled journal bearing (11,21) acts between the base assembly (19) and the hub (16) to provide radial support of the hub (16). A gas filled thrust bearing (26, 27, 35) also acts between the hub (16) and base assembly (19) to provide at least axial support of the hub (16).
Claims31
An electric spindle motor comprising a base assembly, a hollow rotatable hub housing a motor, said hub being mounted for rotation about a rotational axis, a stator mounted with said base assembly and disposed within said hub, a liquid filled journal bearing acting between said hub and said base assembly to provide radial support of said hub, and a gas filled thrust bearing acting between said hub and said base assembly to provide at least axial support of said hub, wherein said thrust bearing includes a thrust plate having a first thrust surface extending outwardly from said rotational axis and a correspondingly shaped first bearing surface spaced apart from said first surface by a first bearing clearance, and further wherein said first thrust surface and said first bearing surface are substantially flat and are inclined at an angle of about 12.5.degree. with respect to a normal to the rotational axis.
Dependencies are inferred from the claim text.